Fire fiend suspect Peter Braunstein has been spotted again – this time peddling his plasma at a Tennessee blood bank where he brazenly used his own name to taunt investigators, police sources said yesterday.

The disgraced journalist was spotted on Nov. 28 at the Tennessee Blood Services center in Memphis, looking “freshly groomed and well dressed” as he calmly put out his arm and endured a needle prick that earned him $20, police sources said.

Braunstein told staffers at the blood center he was trying to finance his travels, but detectives believe his reappearance is not an indication he is low on funds – but a way to prove his superiority over his pursuers. “We don’t think he’s out of money,” an investigation source said. “He’s trying to mess with us.”

Cops are also checking whether Braunstein has sold his semen to sperm banks, a law-enforcement source said.

Braunstein’s trip to Elvis’ hometown came to light after two workers at the blood facility spotted the curly-haired creep’s mug shot on “America’s Most Wanted.”

They later compared notes, and one of them called the show’s hot line on Dec. 12 after she clearly remembered her customer and his famously obnoxious manner.

“When he was at the center, there was nothing really suspicious about him,” staffer Andrea Chatman told The Post.

“My first impression, really, was that he was very cocky. Even the way he spoke was arrogant.”

“One thing that was odd was he didn’t take his jacket off – most people do because it takes a while.” Chatman said Braunstein was curt and left as fast as he could.

He even signed his real name. When he was spotted in Cleveland, Ohio, last month, he went by aliases Peter Grant and Peter Bronson.

“He signed in with his real name, and he signed out with his real name – he did everything by the book,” said Chatman. “When he was finished, and we gave him his receipt for his money, he hopped right up, went to the window, got his money and left.”

He allegedly showed a passport as ID before he gave blood. He signed his full name “Peter Michael Braunstein” in their ledger but did not give his real Social Security number, the woman said. He also told the workers he was a freelance writer.

A police source said investigators are taking the sighting seriously and are checking with other blood banks.

Braunstein’s blood sample has tested negative for HIV – despite reports being checked by police that a former paramour might have been infected with the virus.

Braunstein was wearing a black three-quarter length wool coat and carrying an oversized gray and green backpack. He has been running from cops since Halloween, when, they say, he dressed in a fireman’s outfit as a ruse to force his way in to a former coworker’s Chelsea apartment.

The former Women’s Wear Daily media writer then allegedly gassed his victim with chloroform and molested her for 13 hours, cops say.